app: Inside main app: In nrf_bootloader_init nrf_dfu_settings: Calling nrf_dfu_settings_init()... nrf_dfu_flash: Initializing nrf_fstorage_nvmc backend. nrf_dfu_settings: Using settings page. nrf_dfu_settings: Copying forbidden parts from backup page. nrf_dfu_settings: Destination settings are identical to source, write not needed. Skipping. nrf_dfu_settings: Backing up settings page to address 0xFE000. nrf_dfu_settings: Destination settings are identical to source, write not needed. Skipping. app: Enter nrf_bootloader_fw_activate app: No firmware to activate. app: Boot validation failed. No valid app to boot. app: DFU mode because app is not valid. nrf_bootloader_wdt: WDT is not enabled app: in weak nrf_dfu_init_user app: timer_stop (0x20005984) app: timer_activate (0x20005984) app: Entering DFU mode. app: Initializing transports (found: 1) nrf_dfu_ble: Initializing BLE DFU transport nrf_dfu_ble: Setting up vector table: 0x000F1000 nrf_dfu_ble: Enabling SoftDevice. nrf_dfu_ble: Configuring BLE stack. nrf_dfu_ble: Enabling the BLE stack. nrf_dfu_ble: No advertising name found nrf_dfu_ble: Using default advertising name nrf_dfu_ble: Advertising... nrf_dfu_ble: BLE DFU transport initialized. nrf_dfu_flash: Initializing nrf_fstorage_sd backend. app: Enter main loop nrf_dfu_ble: Connected nrf_dfu_ble: Received BLE_GAP_EVT_DATA_LENGTH_UPDATE_REQUEST. nrf_dfu_ble: Received BLE_GAP_EVT_DATA_LENGTH_UPDATE (27, max_rx_time 328). nrf_dfu_ble: Received BLE_GAP_EVT_CONN_PARAM_UPDATE nrf_dfu_ble: max_conn_interval: 6 nrf_dfu_ble: min_conn_interval: 6 nrf_dfu_ble: slave_latency: 0 nrf_dfu_ble: conn_sup_timeout: 500 nrf_dfu_ble: Received BLE_GAP_EVT_CONN_PARAM_UPDATE nrf_dfu_ble: max_conn_interval: 12 nrf_dfu_ble: min_conn_interval: 12 nrf_dfu_ble: slave_latency: 0 nrf_dfu_ble: conn_sup_timeout: 600 nrf_dfu_ble: Received BLE_GATTS_EVT_EXCHANGE_MTU_REQUEST (request: 517, reply: 247). nrf_dfu_ble: Received BLE_GAP_EVT_DATA_LENGTH_UPDATE_REQUEST. nrf_dfu_ble: Received BLE_GAP_EVT_DATA_LENGTH_UPDATE (27, max_rx_time 328). nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_SELECT (command) nrf_dfu_req_handler: Request handling complete. Result: 0x1 nrf_dfu_ble: Set receipt notif nrf_dfu_req_handler: Handle NRF_DFU_OP_RECEIPT_NOTIF_SET nrf_dfu_req_handler: Request handling complete. Result: 0x1 app: Shutting down transports (found: 1) nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_CREATE (command) app: timer_stop (0x20005984) app: timer_activate (0x20005984) nrf_dfu_req_handler: Request handling complete. Result: 0x1 nrf_dfu_ble: Advertising... nrf_dfu_settings: Using settings page. nrf_dfu_settings: Copying forbidden parts from backup page. nrf_dfu_ble: Connected nrf_dfu_ble: Received BLE_GAP_EVT_DATA_LENGTH_UPDATE_REQUEST. nrf_dfu_ble: Received BLE_GAP_EVT_DATA_LENGTH_UPDATE (27, max_rx_time 328). nrf_dfu_ble: Received BLE_GAP_EVT_CONN_PARAM_UPDATE nrf_dfu_ble: max_conn_interval: 6 nrf_dfu_ble: min_conn_interval: 6 nrf_dfu_ble: slave_latency: 0 nrf_dfu_ble: conn_sup_timeout: 500 nrf_dfu_ble: Received BLE_GAP_EVT_CONN_PARAM_UPDATE nrf_dfu_ble: max_conn_interval: 12 nrf_dfu_ble: min_conn_interval: 12 nrf_dfu_ble: slave_latency: 0 nrf_dfu_ble: conn_sup_timeout: 600